At 21.30 on 24 April 2015, Mr. P. Clemente had met with Mr. Pietro C. to Coast di Lotzorai (OG) with the intention to make an observation of the sky to see if it was possible to notice the phenomena light observed on 20, 22 and April 23, 2015 by Mr. Pietro C .. during the Sky-Watch (which lasted up to 22,45) the two men noticed the "dots" of light that changed the route and flight attitude airspace between East 320 ° East and 90 ° (open sea) Call of 04.24.2015: "Pietro and I ... we saw a" ball "that was coming towards us and I told him - this looks like a satellite ... - instead then stopped in the middle of two other lights and all three have approached each other , then this "ball" turned around a star and came back ... By CISUSARDEGNA